Founding Engineer (£70-90K)
Wexler
GBP 70k-90k / year + Equity
Posted on Jul 8, 2025
🧑💻
Founding Engineer (£70-90K)
We're seeking an entrepreneurial full-stack engineer who will work closely with the founders to architect, build and scale Wexler's agentic systems for document analysis, powered by our state-of-art fact extraction engine.
As a Software Engineer, you will work closely with the founding technical team and contribute to the technical architecture of our product and delivery of our ambitious product roadmap.
You'll play a key role in shaping the culture of our Technical organisation and will learn alongside expert Software and Machine Learning Engineers. You will rapidly take on more responsibility and have a clear path to a leadersh ip position.
Responsibilities:
Architect, build and scale full-stack applications that power Wexler's agentic systems for document analysis
Develop customer-facing features, internal tooling and DevOps infrastructure to support our growing platform
Collaborate with AI engineers to integrate LLM capabilities into production-ready software systems
Build robust, scalable backend systems using modern technologies and cloud infrastructure
Create intuitive user interfaces that allow legal professionals to interact seamlessly with AI-powered tools
Contribute to technical architecture decisions and help establish engineering best practices
Work directly with customers to understand their needs and rapidly iterate on solutions
Technical Must-Haves:
Strong experience with Node.js and TypeScript for backend development
Proficiency with PostgreSQL for database design and optimization
Hands-on experience with AWS cloud services and infrastructure
Python experience for AI/ML system integration
Full-stack development experience with modern frontend frameworks
Experience building scalable, production-grade systems
Understanding of DevOps practices and CI/CD pipelines
You will be:
A builder with a track record of shipping new product features or architectures in a fast-paced environment
Driven by building fantastic product experiences - you can put yourself in the users shoes and understand their struggles
Fascinated by AI and excited to build products at the bleeding edge of this once in a lifetime platform shift (but you don't need to have any prior AI experience)
Full-stack and happy to get stuck in where needed most, be it working on customer-facing features, internal tooling or improving our DevOps
Excited to work in a startup environment. You're excited by the idea of speaking with customers in the morning and shipping features to solve their problems in the afternoon. You're ok with priorities changing and you're comfortable with risk
Someone who values working with people who are low ego, ambitious and pragmatic
Comfortable figuring out how to build things you haven't built before
Excited to work in-person from our office in London. We work from the WeWork in Aldwych, and we spend 4 days a week in person
What We Offer:
Competitive salary and significant equity
Huge autonomy and ownership. You will be designing and building the core systems that power AI for some of the most expert users in AI
Budget for learning and professional growth
Bi-annual team retreats
Work closely with experienced founders and a team of AI scientists and engineers
About the opportunity:
Legal AI has caught the attention of VCs and the wider tech world, but the reality is adoption with users is low in the enterprise, with roughly 20% of lawyers using AI tech. Of those lawyers, most are transactional or contract lawyers and they use generalist platforms that look to aggregate the tasks lawyers do but do not go deep into specific workflows. That's where Wexler is different. We are a 'scalpel' rather than a 'Swiss Army knife', meaning we go deep into the workflows that can decide how a legal case is won. We have extremely positive feedback from lawyers, and we have an ambitious roadmap of features to expand our coverage while retaining the forensic detail that makes our product great.
Some topics you'll think about:
Delightful ‘agentic’ product experiences: Legal AI has largely revolved around AI assistants. we are building workflows that solve specific tasks for expert users. You will be obsessed with defining and building these features.
Scale: architecting systems that scale with our commercial growth, delivering each user a delightful, performant and magical experience.
Security: our customers treat their clients with the highest degree of sensitivity and security. The software we build meets the highest standards of security, ever evolving in the world of AI.
Note: If you think you don't quite fit the bill but you'd still be interested in chatting for a different role, get in touch.